package com.szpx.interceptor;

import com.szpx.entity.User;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor {
	
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
		User user = (User) request.getSession().getAttribute("user");
		if (user == null) { //没有登录-给提醒信息，转发到登录页面重新登录，返回false
			request.setAttribute("msg", "登录后可访问!");
			request.getRequestDispatcher("/index").forward(request, response);
			return false;
		} else {
			return true; //证明是登录过的
		}
	}
	
	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
		HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
	}
	
	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
		HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
	}
}
